Compilare: user.cpp: In function ‘int main()’: user.cpp:18:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] { freopen("suma4.in", "r",stdin); ^ user.cpp:19:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("suma4.out", "w",stdout); ^ user.cpp:21:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:30:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &cost[i].c); ^ user.cpp:27:16: warning: iteration 59 invokes undefined behavior [-Waggressive-loop-optimizations] lexi[i]=INF; ~~~~~~~^~~~ user.cpp:26:15: note: within this loop for(i=1; i<=60; i++) ~^~~~ user.cpp:25:29: warning: iteration 59 invokes undefined behavior [-Waggressive-loop-optimizations] sol[i][j][k]=INF; ~~~~~~~~~~~~^~~~ user.cpp:24:23: note: within this loop for(k=1; k<=60; k++) ~^~~~