Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

func main() {

	sc := bufio.NewScanner(os.Stdin)
	sc.Scan()
	args := strings.Split(sc.Text(), " ")
	n, _ := strconv.Atoi(args[0])
	t, _ := strconv.ParseInt(args[1], 10, 64)

	q, _ := strconv.Atoi(args[2])

	pos := make([]int64, n)
	direction := make([]bool, n)

	for i := 0; i < n; i++ {
		sc.Scan()
		args = strings.Split(sc.Text(), " ")

		pos[i], _ = strconv.ParseInt(args[0], 10, 64)
		q, _ := strconv.Atoi(args[1])
		if q == 1 {
			direction[i] = true
		}
	}

	qq := make([]int, q)
	for i := 0; i < q; i++ {
		sc.Scan()
		args = strings.Split(sc.Text(), " ")

		qq[i], _ = strconv.Atoi(args[0])
	}

	ans(n, q, t, pos, direction, qq)

}

func ans(n, q int, t int64, pos []int64, dir []bool, qq []int) {

	colleation := []int64{} // syoutotu positon

	for i := 1; i < n; i++ {
		if dir[i-1] == dir[i] {
			continue
		}
		colleation = append(colleation, (pos[i-1]+pos[i])/2)

	}
	//fmt.Println(colleation)
	for i := 0; i < q; i++ {
		var ans int64
		ans = int64(-9999999)
		if dir[qq[i]-1] == true {
			// 東向きなら現ポジから＋方向で一番近い衝突点との距離を求めて、Tとの差が
			for _, v := range colleation {
				if v <= pos[qq[i]-1] {
					continue
				} else {
					// 衝突予定点が確定。衝突点との距離がT以下なら衝突点で停止
					if v-pos[qq[i]-1] <= t {
						ans = v
					} else {
						ans = pos[qq[i]-1] + int64(t)
					}
					break
				}
			}
			if ans == -9999999 {
				ans = pos[qq[i]-1] + int64((t))
			}

		} else {
			// nishi向きなら現ポジから-方向で一番近い衝突点との距離を求めて、Tとの差が
			for j := len(colleation); j > 0; j-- {
				if colleation[j-1] >= pos[qq[i]-1] {
					continue
				}
				v := colleation[j-1]
				//fmt.Printf("hoge=%d\n", v)
				// 衝突予定点が確定
				if pos[qq[i]-1]-v <= t {
					ans = v
				} else {
					ans = pos[qq[i]-1] - int64((t))
				}
				break

			}
			if ans == -9999999 {
				ans = pos[qq[i]-1] - int64((t))
			}

		}
		fmt.Printf("%d\n", ans)

	}

}

C++: // aaaaaaaaaaaaa
#include<stdio.h>
#include<stdlib.h>
#include<algorithm>
using namespace std;
long long n,t,q,a[100001],d[100001],x[1001],s[100001],k,f[1001],flg,i,j;
int main(void)
{
	scanf("%lld %lld %lld",&n,&t,&q);
	for(i=1;i<=n;i++){
		scanf("%lld %lld",&a[i],&d[i]);
	}
	for(i=1;i<=q;i++){
		scanf("%lld",&x[i]);
	}
	k=0;
	for(i=1;i<n;i++){
		if(d[i]==1&&d[i+1]==2&&a[i]+t*2>=a[i+1]){
			s[k]=a[i]-(a[i]-a[i+1])/2;
			k++;
		}
	}
	for(j=1;j<=q;j++){
		flg=0;
		for(i=0;i<k;i++){
			if(d[x[j]]==1&&s[i]>=a[x[j]]&&s[i]-t<=a[x[j]]){
				f[j]=s[i];
				flg=1;
//				printf("%lld %lld\n",f[j],s[i]);
				break;
			}
		}
		for(i=k-1;i>=0;i--){
			if(d[x[j]]==2&&s[i]<=a[x[j]]&&s[i]+t>=a[x[j]]){
				f[j]=s[i];
				flg=1;
//				printf("%lld %lld\n",f[j],s[i]);
				break;
			}
		}
		if(flg==0){
			if(d[x[j]]==1) f[j]=a[x[j]]+t;
			else f[j]=a[x[j]]-t;
//			printf("%lld\n",f[j]);
		}
	}
	for(i=1;i<=q;i++){
		printf("%lld\n",f[i]);
	}
	return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;

typedef long long ll;
#define rep(i,n) for(int (i)=0;(i)<(int)(n);++(i))
#define each(itr,c) for(__typeof(c.begin()) itr=c.begin(); itr!=c.end(); ++itr)
#define all(x) (x).begin(),(x).end()
#define mp make_pair
#define pb push_back
#define fi first
#define se second

typedef pair<ll,int> p;

const ll INF=3003003003003003003LL;

int main()
{
    int n,q;
    ll t;
    cin >>n >>t >>q;

    vector<p> a(n);
    rep(i,n) cin >>a[i].fi >>a[i].se;

    vector<ll> ans(n,INF);

    //?\???????????¶???????
    int st=0;
    while(st<n && a[st].se==2)
    {
        ans[st]=a[st].fi-t;
        ++st;
    }

    //??±??????????¶???????
    int ed=n-1;
    while(ed>=0 && a[ed].se==1)
    {
        ans[ed]=a[ed].fi+t;
        --ed;
    }

    while(st<ed)
    {
        int x=st;
        while(x+1<n && a[x+1].se==1) ++x;
        int y=x;
        while(y+1<n && a[y+1].se==2) ++y;
        //printf(" %d %d %d\n", st,x,y);

        //??????x??¨x+1????????????????????????????????????
        bool meet=(a[x+1].fi-t < a[x].fi+t);
        if(meet)
        {
            ll point=a[x].fi+(a[x+1].fi-a[x].fi)/2;
            for(int i=st; i<=x; ++i) ans[i]=min(point,a[i].fi+t);
            for(int i=x+1; i<=y; ++i) ans[i]=max(point,a[i].fi-t);
        }
        else
        {
            for(int i=st; i<=y; ++i)
            {
                if(a[i].se==1) ans[i]=a[i].fi+t;
                else ans[i]=a[i].fi-t;
            }
        }

        st=y+1;
    }

    //answer
    rep(i,q)
    {
        int x;
        cin >>x;
        cout << ans[x-1] << endl;
    }

    return 0;
}

C++: #include<stdio.h>


int main() {
	int N, T, Q, flag = 0;
	int A[10000], D[10000], X[10000];
	scanf("%d %d %d", &N, &T, &Q);
	for (int i = 1; i <= N; i++) {
		scanf("%d %d", &A[i], &D[i]);
	}
	for (int i = 1; i <= Q; i++) {
		scanf("%d", &X[i]);
	}
	for (int i = 1; i <= Q; i++) {
		if (D[X[i]] == 1) {
			for (int j = X[i]+1; j <= N;j++) {
				if (D[j] == 2) {
					if ((A[j-1] + A[j]) / 2 <= A[X[i]] + T) {
						printf("%d\n", (A[j-1] + A[j]) / 2);
						flag = 1;
					}
					break;
				}
			}
			if (flag == 0) {
				printf("%d\n", A[X[i]] + T);
			}
		}
		if (D[X[i]] == 2) {
			for (int j = X[i] -1; j >=1; j--) {
				if (D[j] == 1) {
					if ((A[j+1] + A[j]) / 2 >= A[X[i]] - T) {
						printf("%d\n", (A[j+1] + A[j]) / 2);
						flag = 1;
					}
					break;
				}
			}
			if (flag == 0) {
				printf("%d\n", A[X[i]] - T);
			}
	    }
		flag = 0;
    }
	return 0;
}

C++: #include<stdio.h>


int main() {
	int N, T, Q, flag = 0;
	long int A[100000], D[100000], X[100000];
	scanf("%d %d %d", &N, &T, &Q);
	for (int i = 1; i <= N; i++) {
		scanf("%d %d", &A[i], &D[i]);
	}
	for (int i = 1; i <= Q; i++) {
		scanf("%d", &X[i]);
	}
	for (int i = 1; i <= Q; i++) {
		if (D[X[i]] == 1) {
			for (int j = X[i]+1; j <= N;j++) {
				if (D[j] == 2) {
					if ((A[j-1] + A[j]) / 2 <= A[X[i]] + T) {
						printf("%d\n", (A[j-1] + A[j]) / 2);
						flag = 1;
					}
					break;
				}
			}
			if (flag == 0) {
				printf("%d\n", A[X[i]] + T);
			}
		}
		if (D[X[i]] == 2) {
			for (int j = X[i] -1; j >=1; j--) {
				if (D[j] == 1) {
					if ((A[j+1] + A[j]) / 2 >= A[X[i]] - T) {
						printf("%d\n", (A[j+1] + A[j]) / 2);
						flag = 1;
					}
					break;
				}
			}
			if (flag == 0) {
				printf("%d\n", A[X[i]] - T);
			}
	    }
		flag = 0;
    }
	return 0;

C++: #include <iostream>
#include <algorithm>
using namespace std;

typedef long long ll;

const ll INF = 1ll << 60;
const int MAX_N = 100000;

ll A[MAX_N], D[MAX_N];
ll stops[MAX_N];

int main() {
	ll N, T, Q;
	cin >> N >> T >> Q;
	for (int i = 0; i < N; i++) {
		cin >> A[i] >> D[i]; 
		stops[i] = INF;
	}

	ll s = -INF;
	if (D[0] == 2) stops[0] = s;

	for (int i = 1; i < N; i++) {
		if (D[i - 1] == 1 && D[i] == 2) {
			s = (A[i] + A[i - 1]) / 2;

			for (int j = i - 1; j >= 0 && D[j] == 1; j--)
				stops[j] = s;
		}
		
		if (D[i] == 2) {
			stops[i] = s;
		}
	}

	for (int i = 0; i < Q; i++) {
		ll x;
		cin >> x;
		x--;
		ll ans;
		if (D[x] == 1) ans = min(A[x] + T, stops[x]);
		else ans = max(A[x] - T, stops[x]);
		cout << ans << endl;
	}
}

C++: #include <bits/stdc++.h>
using namespace std;
typedef long long ll;

ll A[100010],res[1010];int D[100010],imp[1010];
int main(){
	ll N,T,Q;
	cin>>N>>T>>Q;
	for(int i=1;i<=N;i++){
		cin>>A[i]>>D[i];
	}
	
	for(int i=1;i<=Q;i++){
		cin>>imp[i];
	}

	vector<ll> vpl;
	for(int i=1;i<N;i++){
		if(D[i]==1&&D[i+1]==2){
			vpl.push_back((A[i]+A[i+1])/2);
		}
	}

	auto it=vpl.begin();
	for(int i=1;i<=Q;i++){
		while(it!=vpl.end()&&(*it)<A[imp[i]]) it++;
		if(D[imp[i]]==2&&it==vpl.begin()){
			res[i]=A[imp[i]]-T;
			continue;
		}
		else if(D[imp[i]]==2) it--;
		if(it==vpl.end()){
			res[i]=A[imp[i]]+T;
			continue;
		}
		if(D[imp[i]]==1){
			res[i]=min(A[imp[i]]+T,*it);
		}
		else{
			res[i]=max(A[imp[i]]-T,*it);
		}
	}
	for(int i=1;i<=Q;i++) cout<<res[i]<<endl;
	return 0;
}