Compilare: main.cpp: In function 'int main()': main.cpp:59:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < xx.size(); i++) ~~^~~~~~~~~~~ main.cpp:61:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < yy.size(); j++) ~~^~~~~~~~~~~ main.cpp:86:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < xx.size(); i++) ~~^~~~~~~~~~~ main.cpp:88:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < yy.size(); j++) ~~^~~~~~~~~~~ main.cpp:23:45: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dreptunghiuri3.in", "r", stdin); ^ main.cpp:24:47: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dreptunghiuri3.out", "w", stdout); ^ main.cpp:27:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &temp1, &temp2, &n); ^ main.cpp:31:79: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d", &w[i].x1, &w[i].y1, &w[i].x2, &w[i].y2, &w[i].val); ^