Language: C++

//ICPC2014-pre Problem F

#include <iostream>
#include <cstdio>
#define rep(i,n) for(int i =0 ;i<n;i++)
using namespace std;



/*
    0

    1
 2  3  5
    4
*/

void acpy(int to[],int from[]){//???????????????
    rep(i,6){
        to[i]=from[i];
    }
}

void moveS(int arg[]){//??????
    int temp[6];
    rep(i,6){
        temp[i]=arg[i];
    }
    arg[0]=temp[4]+1;
    arg[1]=temp[0];
    arg[2]=temp[2];
    arg[3]=temp[1];
    arg[4]=temp[3];
    arg[5]=temp[5];
}

void moveN(int arg[]){//??????
    int temp[6];
    rep(i,6){
        temp[i]=arg[i];
    }
    arg[0]=temp[1]+1;
    arg[1]=temp[3];
    arg[2]=temp[2];
    arg[3]=temp[4];
    arg[4]=temp[0];
    arg[5]=temp[5];
}


void moveE(int arg[]){//??±???
    int temp[6];
    rep(i,6){
        temp[i]=arg[i];
    }
    arg[0]=temp[5]+1;
    arg[1]=temp[1];
    arg[2]=temp[0];
    arg[3]=temp[2];
    arg[4]=temp[4];
    arg[5]=temp[3];
}

void moveW(int arg[]){//?\????
    int temp[6];
    rep(i,6){
        temp[i]=arg[i];
    }
    arg[0]=temp[2]+1;
    arg[1]=temp[1];
    arg[2]=temp[3];
    arg[3]=temp[5];
    arg[4]=temp[4];
    arg[5]=temp[0];
}

bool check(int t[],int arg[]){//??????
    int per[6]={0,1,2,3,4,5};
    int tnow[6];
    bool ans = 0;
    rep(i,720){
        int flag = 1;
        rep(j,6){
            tnow[j]=t[per[j]]-arg[j];
            if(tnow[j]<0){
                flag = 0;
                break;}
        }
        if(flag != 0) {
            int now = tnow[0]+tnow[3];
            int ne1 = tnow[1]+tnow[4];
            int ne2 = tnow[2]+tnow[5];
            if(now<=ne1+ne2&&ne1-1 <=now+ne2&&ne2-1 <=now+ne1)???//???????????????
                ans = 1;
        }
        if(ans == 1)
            break;
        next_permutation(per,per+6);
    }
    return ans;
}


int main(){
    int now[6];
    int prev[6];
    char s[40000];
    int t[6];
    int sum;
    int p,q;
    int fs[6]={0,1,2,3,4,5};
    
    while(1){
        sum = 0;
        rep(i,6){
            scanf("%d",t+i);
            sum += t[i];
        }
        if(sum==0){
            break;
        }
        scanf("%d %d",&p,&q);
        bool flag = 1;
        rep(i,6){
            prev[i]=0;
        }
        int hoge = 1;
        rep(sz,sum){
            acpy(now,prev);
            moveE(now);
            if(check(t,now)){
                acpy(prev,now);
                s[sz]='E';
                continue;
            }
            
            acpy(now,prev);
            moveN(now);
            if(check(t,now)){
                acpy(prev,now);
                s[sz]='N';
                continue;
            }
            
            acpy(now,prev);
            moveS(now);
            if(check(t,now)){
                acpy(prev,now);
                s[sz]='S';
                continue;
            }
            
            acpy(now,prev);
            moveW(now);
            if(check(t,now)){
                acpy(prev,now);
                s[sz]='W';
                continue;
            }
            hoge = 0;
            break;
            
        }
        if(hoge == 0){
            printf("impossible\n");
        }else{
            for(int i = p-1;i < q;i++){
                printf("%c",s[i]);
            }
            printf("\n");
        }
    
    }
}

Compiler output:
a.cc:93:64: warning: trigraph ??/ ignored, use -trigraphs to enable [-Wtrigraphs]
   93 |             if(now<=ne1+ne2&&ne1-1 <=now+ne2&&ne2-1 <=now+ne1)???//???????????????
a.cc: In function 'bool check(int*, int*)':
a.cc:93:63: error: expected primary-expression before '?' token
   93 |             if(now<=ne1+ne2&&ne1-1 <=now+ne2&&ne2-1 <=now+ne1)???//???????????????
      |                                                               ^
a.cc:93:64: error: expected primary-expression before '?' token
   93 |             if(now<=ne1+ne2&&ne1-1 <=now+ne2&&ne2-1 <=now+ne1)???//???????????????
      |                                                                ^
a.cc:93:65: error: expected primary-expression before '?' token
   93 |             if(now<=ne1+ne2&&ne1-1 <=now+ne2&&ne2-1 <=now+ne1)???//???????????????
      |                                                                 ^
a.cc:94:24: error: expected ':' before ';' token
   94 |                 ans = 1;
      |                        ^
      |                        :
a.cc:94:24: error: expected primary-expression before ';' token
a.cc:94:24: error: expected ':' before ';' token
   94 |                 ans = 1;
      |                        ^
      |                        :
a.cc:94:24: error: expected primary-expression before ';' token
a.cc:94:24: error: expected ':' before ';' token
   94 |                 ans = 1;
      |                        ^
      |                        :
a.cc:94:24: error: expected primary-expression before ';' token
a.cc:98:9: error: 'next_permutation' was not declared in this scope
   98 |         next_permutation(per,per+6);
      |         ^~~~~~~~~~~~~~~~