View Compilation Error

0_0_24422328_8730.cpp: In function 'int main()':
0_0_24422328_8730.cpp:8:11: error: 'cin' was not declared in this scope
     while(cin >> L1 >> L2 >> L3 >> C1 >> C2 >> C3){
           ^
0_0_24422328_8730.cpp:10:37: error: 'swap' was not declared in this scope
         if(from > to) swap(from , to);
                                     ^
0_0_24422328_8730.cpp:14:29: error: 'scanf' was not declared in this scope
             scanf("%d",&d[i]);
                             ^
0_0_24422328_8730.cpp:26:46: error: 'min' was not declared in this scope
                 dp[i] = min(dp[i] , dp[j] + m);
                                              ^
0_0_24422328_8730.cpp:29:9: error: 'cout' was not declared in this scope
         cout << dp[to] << endl;
         ^
0_0_24422328_8730.cpp:29:27: error: 'endl' was not declared in this scope
         cout << dp[to] << endl;
                           ^