Compilare: user.cpp: In function ‘int main()’: user.cpp:22:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hacker3.in","r",stdin); ^ user.cpp:23:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hacker3.out","w",stdout); ^ user.cpp:24:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:26:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a[i].x,&a[i].y); ^ user.cpp:28:66: warning: array subscript is above array bounds [-Warray-bounds] if(dp[i-1][1].x + a[i].y*1LL*calc(dp[i-1][1].y) < dp[i-1][2].x + a[i].y*1LL*calc(dp[i-1][2].y)){ ^ user.cpp:28:97: warning: array subscript is above array bounds [-Warray-bounds] if(dp[i-1][1].x + a[i].y*1LL*calc(dp[i-1][1].y) < dp[i-1][2].x + a[i].y*1LL*calc(dp[i-1][2].y)){ ^ user.cpp:34:31: warning: array subscript is above array bounds [-Warray-bounds] dp[i][1].y = dp[i-1][2].y; ^ user.cpp:37:20: warning: array subscript is above array bounds [-Warray-bounds] if(dp[i-1][2].x + a[i].x*1LL*calc(dp[i-1][2].y) < dp[i-1][1].x + a[i].x*1LL*calc(dp[i-1][1].y)){ ^ user.cpp:37:51: warning: array subscript is above array bounds [-Warray-bounds] if(dp[i-1][2].x + a[i].x*1LL*calc(dp[i-1][2].y) < dp[i-1][1].x + a[i].x*1LL*calc(dp[i-1][1].y)){ ^ user.cpp:38:16: warning: array subscript is above array bounds [-Warray-bounds] dp[i][2].x = dp[i-1][2].x + a[i].x*1LL*calc(dp[i-1][2].y); ^ user.cpp:39:31: warning: array subscript is above array bounds [-Warray-bounds] dp[i][2].y = dp[i-1][2].y+1; ^ user.cpp:39:16: warning: array subscript is above array bounds [-Warray-bounds] dp[i][2].y = dp[i-1][2].y+1; ^ user.cpp:42:16: warning: array subscript is above array bounds [-Warray-bounds] dp[i][2].x = dp[i-1][1].x + a[i].x*1LL*calc(dp[i-1][1].y); ^ user.cpp:43:16: warning: array subscript is above array bounds [-Warray-bounds] dp[i][2].y = dp[i-1][1].y+1; ^ user.cpp:46:33: warning: array subscript is above array bounds [-Warray-bounds] cout<<min(dp[n][1].x,dp[n][2].x)<<'\n'; ^