#pragma GCC optimize ("O3")
#pragma GCC target ("avx")
#include "bits/stdc++.h" // define macro "/D__MAI"

using namespace std;
typedef long long int ll;

#define xprintf(fmt,...) fprintf(stderr,fmt,__VA_ARGS__)
#define debugv(v) {printf("L%d %s > ",__LINE__,#v);for(auto e:v){cout<<e<<" ";}cout<<endl;}
#define debuga(m,w) {printf("L%d %s > ",__LINE__,#m);for(int x=0;x<(w);x++){cout<<(m)[x]<<" ";}cout<<endl;}
#define debugaa(m,h,w) {printf("L%d %s >\n",__LINE__,#m);for(int y=0;y<(h);y++){for(int x=0;x<(w);x++){cout<<(m)[y][x]<<" ";}cout<<endl;}}
#define ALL(v) (v).begin(),(v).end()
#define repeat(cnt,l) for(auto cnt=0ll;cnt<(l);++cnt)
#define iterate(cnt,b,e) for(auto cnt=(b);cnt!=(e);++cnt)
#define MD 1000000007ll
#define PI 3.1415926535897932384626433832795
template<typename T1, typename T2> ostream& operator <<(ostream &o, const pair<T1, T2> p) { o << "(" << p.first << ":" << p.second << ")"; return o; }
template<typename iterator> inline size_t argmin(iterator begin, iterator end) { return distance(begin, min_element(begin, end)); }
template<typename iterator> inline size_t argmax(iterator begin, iterator end) { return distance(begin, max_element(begin, end)); }
template<typename T> T& maxset(T& to, const T& val) { return to = max(to, val); }
template<typename T> T& minset(T& to, const T& val) { return to = min(to, val); }

mt19937_64 randdev(8901016);
inline ll rand_range(ll l, ll h) {
    return uniform_int_distribution<ll>(l, h)(randdev);
}

#ifdef __MAI
#define getchar_unlocked getchar
#define putchar_unlocked putchar
#endif
#ifdef __VSCC
#define getchar_unlocked _getchar_nolock
#define putchar_unlocked _putchar_nolock
#endif
namespace {
#define isvisiblechar(c) (0x21<=(c)&&(c)<=0x7E)
    class MaiScanner {
    public:
        template<typename T> void input_integer(T& var) {
            var = 0;
            T sign = 1;
            int cc = getchar_unlocked();
            for (; cc<'0' || '9'<cc; cc = getchar_unlocked())
                if (cc == '-') sign = -1;
            for (; '0' <= cc&&cc <= '9'; cc = getchar_unlocked())
                var = (var << 3) + (var << 1) + cc - '0';
            var = var*sign;
        }
        inline int c() { return getchar_unlocked(); }
        inline MaiScanner& operator>>(int& var) {
            input_integer<int>(var);
            return *this;
        }
        inline MaiScanner& operator>>(long long& var) {
            input_integer<long long>(var);
            return *this;
        }
        inline MaiScanner& operator>>(string& var) {
            int cc = getchar_unlocked();
            for (; !isvisiblechar(cc); cc = getchar_unlocked());
            for (; isvisiblechar(cc); cc = getchar_unlocked())
                var.push_back(cc);
            return *this;
        }
        template<typename IT> void in(IT begin, IT end) {
            for (auto it = begin; it != end; ++it) *this >> *it;
        }
    };
    class MaiPrinter {
        int stack_p;
        char stack[32];
    public:
        template<typename T>
        void output_integer(T var) {
            if (var == 0) {
                putchar_unlocked('0');
                return;
            }
            if (var < 0) {
                putchar_unlocked('-');
                var = -var;
            }
            stack_p = 0;
            while (var) {
                stack[stack_p++] = '0' + (var % 10);
                var /= 10;
            }
            while (stack_p)
                putchar_unlocked(stack[--stack_p]);
        }
        MaiPrinter& operator<<(char c) {
            putchar_unlocked(c);
            return *this;
        }
        MaiPrinter& operator<<(int var) {
            output_integer<int>(var);
            return *this;
        }
        MaiPrinter& operator<<(long long var) {
            output_integer<long long>(var);
            return *this;
        }
        MaiPrinter& operator<(int var) {
            output_integer<int>(var);
            putchar_unlocked(' ');
            return *this;
        }
        MaiPrinter& operator<(long long var) {
            output_integer<long long>(var);
            putchar_unlocked(' ');
            return *this;
        }
        MaiPrinter& operator<<(const string& str) {
            const char* p = str.c_str();
            const char* l = p + str.size();
            while (p < l) putchar_unlocked(*p++);
            return *this;
        }
    };
}
MaiScanner scanner;
MaiPrinter printer;





template<typename T>
//typedef int T;
class segtree {
    int size;
    vector<T> valdata;
    vector<int> addtree;
    vector<int> mintree;
    vector<int> maxtree;

    int _geti(const vector<int>& v, int idx) const {
        if (size - 1 <= idx) return (idx - size + 1);
        // if (idx < 0) return idx;
        return v[idx];
    }
public:

    segtree(int n) {
        size = 8;
        while (size < n) size <<= 1;
        mintree.resize(size);
        maxtree.resize(size);
        valdata.resize(size);
        addtree.resize(size);
    }

    // tree?????????
    void flat() {
        for (int i = size - 2; 0 <= i; --i) {
            int c = 2 * i + 1;
            if (size - 1 <= c) {
                mintree[i] = c - size + 1;
                maxtree[i] = c - size + 1;
            }
            else {
                mintree[i] = mintree[c];
                maxtree[i] = maxtree[c];
            }
        }
    }

    // TODO:verify
    // addtree???0????????????valdata??????????????????
    void apply(T sum = 0, int ptr = 0) {
        if (size - 1 <= ptr) {
            valdata[ptr - size + 1] += sum;
        }
        else {
            sum += addtree[ptr];
            apply(sum, ptr * 2 + 1);
            apply(sum, ptr * 2 + 2);
            addtree[ptr] = 0;
        }
    }

    void fill(T val) {
        std::fill(valdata.begin(), valdata.end(), val);
        std::fill(addtree.begin(), addtree.end(), 0);
        flat();
    }

    // T operator[](int index) const {
    //     
    // }

    T getval(int index) const {
        T sum = valdata[index];
        index += size - 1;
        while (0 < index) {
            index = (index - 1) / 2; // ???????§????
            sum += addtree[index];
        }
        return sum;
    }

    void setval(int index, const T e) {
        valdata[index] = e;

        for (int i = index + size - 1; 0 < i;) {
            i = (i - 1) / 2; // ???????§????
            valdata[index] -= addtree[i];
        }
        index += size - 1;
        while (0 < index) {
            index = (index - 1) / 2; // ???????§????
            int c1 = index * 2 + 1;
            int c2 = index * 2 + 2;
            int i1, i2;
            i1 = _geti(mintree, c1);
            i2 = _geti(mintree, c2);
            mintree[index] = getval(i1) < getval(i2) ? i1 : i2;
            i1 = _geti(maxtree, c1);
            i2 = _geti(maxtree, c2);
            maxtree[index] = getval(i1) > getval(i2) ? i1 : i2;
        }
    }

    void addvalrange(int begin, int end, const T e, int ptr = 0, int rangebegin = 0, int rangeend = 0) {
        if (rangeend <= rangebegin) { rangeend = size; }

        if (rangeend <= begin || end <= rangebegin) return;
        if (begin <= rangebegin && rangeend <= end) {
            if (size - 1 <= ptr)
                valdata[ptr - size + 1] += e;
            else
                addtree[ptr] += e;
            return;
        }

        int rangemid = (rangebegin + rangeend) / 2;
        addvalrange(begin, end, e, ptr * 2 + 1, rangebegin, rangemid);
        addvalrange(begin, end, e, ptr * 2 + 2, rangemid, rangeend);

        int i1, i2;
        i1 = _geti(mintree, ptr * 2 + 1);
        i2 = _geti(mintree, ptr * 2 + 2);
        mintree[ptr] = getval(i1) < getval(i2) ? i1 : i2;
        i1 = _geti(maxtree, ptr * 2 + 1);
        i2 = _geti(maxtree, ptr * 2 + 2);
        maxtree[ptr] = getval(i1) > getval(i2) ? i1 : i2;

    }

    int getminrangeIdx(int begin, int end, int ptr = 0, int rangebegin = 0, int rangeend = 0) const {
        if (rangeend <= rangebegin) { rangeend = size; }

        if (rangeend <= begin || end <= rangebegin) return begin; // note:????????????????????????????????????index?????????
        if (begin <= rangebegin && rangeend <= end) return _geti(mintree, ptr);

        int rangemid = (rangebegin + rangeend) / 2;
        int l = getminrangeIdx(begin, end, ptr * 2 + 1, rangebegin, rangemid);
        int r = getminrangeIdx(begin, end, ptr * 2 + 2, rangemid, rangeend);

        if (getval(l) <= getval(r))
            return l;
        else
            return r;
    }

    T getminrange(int begin, int end) {
        return getval(getminrangeIdx(begin, end));
    }

    int getmaxrangeIdx(int begin, int end, int ptr = 0, int rangebegin = 0, int rangeend = 0) const {
        if (rangeend <= rangebegin) { rangeend = size; }

        if (rangeend <= begin || end <= rangebegin) return begin; // note:????????????????????????????????????index?????????
        if (begin <= rangebegin && rangeend <= end) return _geti(maxtree, ptr);

        int rangemid = (rangebegin + rangeend) / 2;
        int l = getmaxrangeIdx(begin, end, ptr * 2 + 1, rangebegin, rangemid);
        int r = getmaxrangeIdx(begin, end, ptr * 2 + 2, rangemid, rangeend);

        if (getval(l) >= getval(r))
            return l;
        else
            return r;
    }

    T getmaxrange(int begin, int end) {
        return getval(getmaxrangeIdx(begin, end));
    }
};



ll m, n, kei;


int main() {
    int q;
    scanner >> n >> q;

    segtree<ll> seg(n);

    repeat(_, q) {
        int t;
        scanner >> t;
        if (t == 0) {
            int s, t, x;
            scanner >> s >> t >> x;
            --s; --t;
            seg.addvalrange(s, t + 1, x);
        }
        else {
            int s, t;
            scanner >> s;
            --s;// --t;
            printer << (seg.getval(s)) << '\n';
        }
    }

    return 0;
}

Measured memory_bytes: 5424