Compilare: main.cpp: In function 'int main()': main.cpp:14:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tsunami.in","r",stdin); ^ main.cpp:15:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tsunami.out","w",stdout); ^ main.cpp:16:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &h); ^ main.cpp:19:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i][j]); ^ main.cpp:31:35: warning: iteration 3 invokes undefined behavior [-Waggressive-loop-optimizations] l2=l+dx[i2]; ~~~~~^ main.cpp:30:37: note: within this loop for (int i2=1;i2<=4;i2++) { ~~^~~