제출 #52141

#제출 시각아이디문제언어결과실행 시간메모리
52141ainta스탬프 수집 (JOI16_ho_t2)C++17
100 / 100
5 ms3488 KiB
#include<cstdio> #include<algorithm> using namespace std; int C[101000][3]; int n; char p[101000]; long long s = 0, res, s2 = 0, M; int main() { int i, j; scanf("%d", &n); scanf("%s", p + 1); for (i = 1; i <= n; i++) { for (j = 0; j < 3; j++)C[i][j] = C[i - 1][j]; if (p[i] == 'J')C[i][0]++; if (p[i] == 'O') { s += C[i][0]; C[i][1]++; } if (p[i] == 'I') { C[i][2]++; res += s; } } int c = 0; for (i = n; i >= 1; i--) { if (p[i] == 'I')c++; if (p[i] == 'O')s2 += c; } M = max(s2, s); for (i = 0; i <= n; i++) { M = max(M, 1ll*C[i][0] * (C[n][2] - C[i][2])); } printf("%lld\n", res + M); }

컴파일 시 표준 에러 (stderr) 메시지

2016_ho_t2.cpp: In function 'int main()':
2016_ho_t2.cpp:10:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
2016_ho_t2.cpp:11:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s", p + 1);
  ~~~~~^~~~~~~~~~~~~
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