Compilare: main.cpp: In function 'void Subtask2()': main.cpp:96:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &k, &qu); ^ main.cpp:99:75: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d", &q[i].l1, &q[i].c1, &q[i].l2, &q[i].c2, &q[i].val); ^ main.cpp: In function 'int main()': main.cpp:109:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("amat.in", "r", stdin); ^ main.cpp:110:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("amat.out", "w", stdout); ^ main.cpp:112:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &cer, &n, &m); ^ main.cpp:116:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i][j]); ^